St. Edmund the Martyr was a king of East Anglia who reigned in the 9th century. He is best known for his resistance against the Viking invasions. According to legend, he was captured by the Vikings and refused to renounce his Christian faith, leading to his martyrdom. His death is believed to have occurred around 869 AD. Edmund was later venerated as a saint, and his feast day is celebrated on November 20. His remains were initially buried in Bury St. Edmunds, a town named in his honor, which became a significant pilgrimage site in medieval England.